Orthognathic planning system and method

Abstract

An orthognathic planning system applied with at least a dental cast includes an articulator, a detecting device, at least a label module and a data processing device. The dental cast is mounted on the articulator. The detecting device is disposed with respect to the articulator. The label module has at least a label and is disposed on the dental cast. The data processing device is signally connected with the detecting device and stores midface and mandible image data. The detecting device traces the label and provides position data, and the data processing device provides orthognathic planning data in accordance with the position data and the midface and mandible image data. The present invention also discloses an orthognathic planning method.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 100123943 filed in Taiwan, Republic of China on Jul. 6, 2011, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The invention relates to an orthognathic planning system with a navigation function, and an orthognathic planning method.[0004]2. Related Art[0005]Clinically, there are many patients having special maxillofacial ratios or incorrect occlusal relationships between upper and lower rows of teeth. Such a kind of abnormally growth problem often accompanies with the facial asymmetry, the mandibular prognathism, the mandible retrusion or the poor occlusal condition on the organization structure. Regarding the life, the patient tends to encounter the stoppages, such as the pronunciation difficulties, the chewing digestive diseases, the lack of confidence, or even...

AI Technical Summary

Benefits of technology

The invention provides an orthognathic planning system and method that provide more precise data to the operator, allowing for a closer match between the preoperative planning and the actual surgery. This improves the accuracy of the surgical planning and reduces errors, leading to a higher success rate. The system can also represent the relative position between the dental cast and the craniofacial jaw in real-time, allowing for comparison and selection among various planning programs. The invention utilizes a detecting device to trace the labels and synchronize the dental cast with the facial jawbone image data, resulting in orthognathic planning data that can be easily observed and evaluated. Compared to conventional methods, the invention can provide a better representation of the spatial relationship between the dental cast and the facial jawbone, saving time and manpower. The predicted orthognathic result can be recorded and used for comparison and selection between various sets of planning data.

Problems solved by technology

Such a kind of abnormally growth problem often accompanies with the facial asymmetry, the mandibular prognathism, the mandible retrusion or the poor occlusal condition on the organization structure.

Regarding the life, the patient tends to encounter the stoppages, such as the pronunciation difficulties, the chewing digestive diseases, the lack of confidence, or even the other's discrimination and the people's strange looks.

Because the object of the orthognathic surgery is to correct the upper facial structure of the jaw, such as the facial asymmetry, the facial harmonious proportion or the like, as well as the growth problem, or to correct the skeleton structure change, which cannot be easily or cannot be completed using braces.

Because only the two-dimensional information is provided by the X-ray images of the front side and the lateral side, but a series of complicated processes including simulating the surgical osteotomy and manufacturing, moving the dental cast and the like have to be performed, the long-term problem that the orthognathic planning on the clinical practice has to rely on the experience and the technique of the main surgeon is caused.

First, the lack of the planning synchronization between the teeth and the jawbone causes the perfect postoperative dentition occlusion but the unsymmetrical overview of the maxilla and the mandible.

Second, it is too time-consumptive to perform the adjustment of transferring the cephalometric data to the physical plaster dental cast by way of try-and-error, and the occlusion and symmetry cannot be satisfied concurrently.

Third, it is difficult to use the two-dimensional data to truly represent the three-dimensional spatial relationship between the midface and the mandible.

Fourth, it is difficult for the orthognathic planning surgery program, mainly based on the occlusion with the aid of the X-ray cephalometric data, to achieve the overall symmetry of the facial jawbone.

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